Taupo Gliding Club GLIDING CLUB ASK21 ZK-GTG

Transcription

1 Taupo Gliding Club GLIDING CLUB ASK21 ZK-GTG Handling Notes - Handling Notes - Daily Inspection Checklist - Rigging / DeRigging Notes - Placards - Wheel Brake Information - Inspection Schedule Taupo Gliding Club Inc Page 1 22/06/2010

2 Taupo Gliding Club HANDLING NOTES ASK 21 The ASK 21 is a two-seat sailplane, in tandem configuration, with a sprung, fixed main wheel and nose wheel and T-Tail, with the following dimensions, Wing Span metres. Fuselage Length 8.35 metres. Wing Area M 2 Height 1.50 metres Aspect Ratio 16:1 Max AUW 600 Kg Max Wing Loading 33.4 kg/m 2 Empty Weight Kg Vne 151 Kts Max Rough Air (V B ) 108 Kts Max Maneuvering (V M ) 97 Kts Max Aerotow (V T ) 97 Kts Max Winch Launch (V W ) 81 Kts V ne Reduction with Altitude Alt (Ft) <5000 <10000 <15000 <20000 V NE (Kts) Cockpit Load, subject to AUW. Front Seat, Min 70 Kg Max 110 Kg Rear Seat, Min 0 Kg Max 110 Kg Wing Root Baggage Max, 10 Kg each side. Cockpit Ballast (1 disc = 1.25 Kg pilot weight) Weights Min Cockpit Load (Kg) Weights Min Cockpit Load (Kg) Tow Rope Weak Link: Aerotow: 600 Kg Winch Tow: 1000 Kg Tyre Pressure Main 270 kpa Nose 200 kpa Tail 250 kpa 38 PSI 28 PSI 36 PSI Crosswind Component: Demonstrated crosswind component, 8 Kts, (15 Km.Hr) Wet Wings: add 5 Kts to approach speed with wet wings. Approved Aerobatic Maneuvers (Single & Dual Entry Speeds, Kts) Single Dual Single Dual Loop, Stall Turn, Split 'S', Immelmann, Slow Roll, Steep Climbing Turn, Lazy Eight, Chandelle, Taupo Gliding Club Inc Page 2 22/06/2010

3 Inverted Flight, No Pitot extension With Pitot Extension Vne 130 Kts IAS 151 Kts IAS Maneuvering 76 Kts IAS 97 Kts IAS Wheel Brake The ASK 21 main wheel brake is a very effective, heavy duty, hydraulically actuated disc brake operated at the full extension of the air-brake lever. Care must be exercised to ensure the brake is not ON at touchdown. Heavy use of the brake will result in extreme temperatures at the disc. The hydraulic brake fluid reservoir is visible through a small Perspex window on the left side of the rear seat. Canopies: The rear canopy may focus the sun to one spot, resulting in the potential for damage (fire) to the glider. This may be overcome by turning the glider nose into a north or south alignment while on the ground. The rear canopy is inter-locked with the front canopy, which cannot be locked until the rear canopy is locked. Warning!! If the rear canopy is opened after the front canopy is closed, the inter-lock is bypassed. The front canopy is jettisoned by operating the canopy jettison lever. The rear canopy is jettisoned by opening the rear canopy, and pushing it up into the airstream (if necessary). The canopies are supported by gas struts, which assist in the opening of the canopies and hold them open. As these struts weaken, there is the potential for them to be blown closed or be unable to support the weight of the canopy. The canopies must never be left open and unattended. Electronic Vario The sailplane is fitted with an LX160 electronic Variometer with rear repeater. The full-scale range of this Vario is +/- 5 metres/sec (approx 10 knots), while the full-scale range of the audio generator is +/- 15 metres/sec. The audio tone is distinctly perceivable through the full range requiring little attention to the visual indicator. The volume of the audio output is linked to airspeed, which results in the audio sound level increasing as speed is increased to overcome the additional background noise level. Mode switching is achieved by operation of a switch on the Vario. A separate Manual is provided for the LX160. The manual is on the web site. Radio The sailplane is fitted with a Becker VHF radio with a remote control available to the rear seat.. Details are found on the Club web site together with these ASK21 notes. Pilots should familiarize themselves with the detailed operation. The controls on this radio are, Off On Volume switch Frequency Selector OFF = radio power off. ON = radio power on, Volume = rotate to set volume Large Knob, selects MHz. Small Knob, selects KHz. Taupo Gliding Club Inc Page 3 22/06/2010

4 Transmit frequency is shown at the top of display. Standby frequency is shown in smaller font below. Toggle button on the right of the display Sailplane Seats The seats in the ASK 21 consist of a moulded fiberglass shell which includes an area for a parachute. If a parachute is not worn, cushions are required. A fabric covered thin foam lining is installed over both seats. The back-rest in each seat is adjustable to cater for different size pilots. It is necessary to be outside the glider to adjust the backrest, which is best accomplished by lifting the bottom of the backrest up to allow the locating rack to be adjusted. It is a requirement that the locating rack be adjusted such that both sides of the back-rest are even to avoid damage to the backrest supports. Pitot Extension Tube A small aluminium extension tube is provided (stored in the rear seat side-pocket) for inverted flight. During inverted flight, it is necessary to maintain a high nose attitude, which results in an erroneous reading from the ASI. The extension tubes resolves this. When not in use, this tube should be returned to the rear seat side-pocket. Care of the ASK 21 - Never leave the glider with the canopy open. - Clean the Canopy with a damp Chamois or recognized plexiglass cleaner. - Use canopy cover when it is necessary to park the glider outside. - Clean wings and fuselage with a damp Chamois before and after flying. - Do not subject the glider to exposure to intense heat or sunlight unnecessarily if its not to be flown return it to the hangar. - Ensure the cockpits remain clean and tidy. Considerations 1) Because of the nose wheel / main wheel configuration and the loaded C of G, the sailplane rests on the nose and main wheels. On takeoff and landing, it is not possible the "steer" the sailplane unless there is sufficient elevator authority to lift the nose wheel off the ground. On landing, as airspeed decays and elevator authority is lost; it is again not possible to steer (or alter the direction of travel). While this aspect has the advantage of minimizing the risk of a ground loop, it also prevents steering away from objects. 2) The front and rear canopies have the ability to focus the sun's rays, which may result in heat damage or fire to the sailplane. Care must be taken to avoid this occurring. Taupo Gliding Club Inc Page 4 22/06/2010

5 Taupo Gliding Club ASK 21 DAILY INSPECTION 1. Cockpit Check main wing pin fully home and locked. Check all visible control circuitry. Check full and free movement of all controls. Check for foreign / loose objects, Cockpit cleanliness. Check Canopy locks, vents, gas-struts, cleanliness. 2. Undercarriage, Check tyre pressures. Nose wheel 200 kpa (28 psi) Main wheel 260 kpa (38 psi) Tail wheel 250 kpa (36 psi) 3. Check tow release condition and correct function. 4. Check upper and lower wing surfaces (cracks, dents etc) Check airbrake boxes/airbrakes/ailerons. 5. Check fuselage for damage. 6. Check ASI & STATIC PORTS (Rear fuselage). 7. Check TE Probe, security, operation. 8. Check ASI & Vario operation. 9. Check horizontal stabilizer attachment and locking. 10. Check elevator and rudder for correct movement. Check trailing edge of rudder & elevator for damage. 11. Complete Glider paperwork. - Avoid flying in lightning conditions. - With wet wings, increase all speed by 5 Kts. Taupo Gliding Club Inc Page 5 22/06/2010

6 Taupo Gliding Club ASK 21 Rigging & De-Rigging Rigging Ensure all pins, connections etc are cleaned and greased. a) Unlock Airbrake lever. b) Insert Port wing panel first. c) Check that control pushrods are correctly located. d) Insert the Starboard wing panel. e) Insert Main Wing Pins Insert Drag Spar Pins f) Slide tailplane onto locating pins. Elevator is an "automatic" connection. Secure Tailplane. Check elevator function. g) Connect Airbrake and Aileron L'Hotelliers. Ensure L'Hotelliers "locked". h) Check all controls for correct function. i) Seal all joints with tape. - Wing / Fuselage connections. - Drag Spar Pin holes. - Tailplane Attachment bolt. j) Perform control connection "Dual Check". De-Rigging a) Remove all sealing tapes. b) Unlock and disconnect all control connections, - Aileron, Airbrake. c) Using Tool, remove tailplane. Re-Stow Rigging Tool in Cockpit. d) Remove and store main wing pins. e) Remove Wings. Taupo Gliding Club Inc Page 6 22/06/2010

7 Taupo Gliding Club Placards ASK 21 ZK-GTG a) CLOUD FLYING PROHIBITED b) CBS IFT CBE c) SUFTB d) Pilot Weights subject to AUW Front Seat Min Cockpit Load P1 70 Kg Max Cockpit Load 110 Kg Rear Seat Min Cockpit Load 0 Kg Max Cockpit Load 110 Kg Baggage Compartment Max 10 Kg e) TOW RELEASE f) Aerotow Weak Link 600 kg Winch Tow Weak Link 1000 kg g) Speeds Vne Max Winch Tow Max Aerotow Best L/D Stall, Vs Max Control Deflection, Va Rough Air, Vb Safe Approach 151 kts IAS 81 kts IAS 97 kts 48.5 kts 35 kts at 470 kg, 40 kts at 600 kg 97 kts 108 kts (1.5 X Vs) = 52 Kts + 1/2 wind / gust speed. h) Main Wheel , 6 Ply rating. Inflate to 40 psi, 270 kpa, 2.7 Bar Nose Wheel , 4 Ply rating Inflate to 30 psi, 200 kpa, 2.0 Bar Tail wheel Inflate to 37 psi, 250 kpa, 2.5 Bar i) Canopy LIFT ONLY BY THE HANDLES PROVIDED. DO NOT LIFT HERE CAUTION MAGNIFIED SUNS RAYS. Taupo Gliding Club Inc Page 7 22/06/2010

8 TAUPO GLIDING CLUB PILOT HANDLING NOTES ASK 21 The ASK 21 is a fibre-glass 2 seat, tandem configuration standard class sailplane. The large two-piece canopy and mid wing offer excellent visibility. The glider is fully aerobatic. It is fitted with a fixed wheel main wheel and nose wheel. This sailplane does not have flaps or facilities to carry water ballast. Daily Inspection The daily inspection is straight forward. H otellier couplings are used on the main control systems, with access provided through a small hand hole in the top of the fuselage, reached from behind the port wing. A slotted screw-driver or coin will open the hatch. Care is required not to damage the fibreglass surface of the wing with hands or elbows while conducting the inspection of control system couplings. Cockpits. The cockpit layout of the ASK 21 is standard. All controls fall easily to hand. The cockpit is entered through a large 2 piece canopy. The pilot s weight should be supported on the sides of the fuselage when boarding, while stepping onto the obvious floor area of the cockpit. The rear pilot must take care not to allow elbows to damage the wing surface while entering and leaving the rear seat. Canopy The Canopy is a large, two-piece unit, with each section supported by an air strut. When opening and closing the canopy, a secure grip should be maintained on the handles provided until the canopy section has reached the limit of its travel both UP and DOWN. Do not support the canopy other than by the handles. The locking mechanism on the canopy sections are interlocked. The front section cannot be locked until the rear canopy is closed and locked. Locking is achieved by pushing white handles (like paddles) on either side of the canopy fully forward. Unlocking is achieved by pulling the white handles out/back. Do not force these handles. The front canopy has an emergency jettison handle located at the front of the canopy. The rear canopy is jettisoned by opening the canopy into the slip stream. Both the front and rear canopy sections have the ability to focus the sun's rays when open outdoors. This may result in fire and / or damage to the sailplane or it's equipment. This is more likely to occur when the sailplane is aligned east west. The sailplane should be parked with the canopy cover installed, in a north-south direction, or preferably, in the hangar. Taupo Gliding Club Inc Page 8 22/06/2010

9 Seating The front seat back is adjustable. Adjustment must be made while out of the seat, ensuring that both sides of the locking mechanism are symmetrical and fully engaged. Cushions should be used if further seat adjustment is required. The seats are designed for pilots wearing parachutes. Appropriate cushions are recommended if a parachute is not worn. A max seat limit weight of 110 Kg applies. Conventional safety harnesses are fitted in both cockpits, with an additional strap provided between the pilots legs for aerobatic flight. The harness mechanism is released by turning the centre of the buckle. Flying Controls Flying controls are standard. The elevator trim is located immediately alongside the stick and consists of a load adjustable spring on the elevator pushrod system. The trim is effective, although at max cockpit loading there is a tendency to run out of back trim. The front rudder pedals are readily adjustable in flight, using the pull cable. Ensure the rudder pedals are re-locked in position following adjustment (push on both pedals equally). The rear pedals may also be adjusted, using a simple adjusting frame on the rear floor. The tow release (yellow knob) is located to the left of the control column. Two tow release points are located on the aircraft - the forward unit for aerotow and the rear release mechanism for winch launch. Care is required to ensure the correct release unit is used. The airbrake lever is located on the left wall of the cockpit. A very positive over-centre lock keeps the airbrakes closed. The very effective wheel brake is operated at the full extension of airbrakes. Pilots must ensure the wheel brake is not on at touchdown. Instruments Standard instruments are installed. A G-Meter is provided to monitor loading during aerobatic and inverted flight. Electric instruments and the radio are powered from a common battery, stored inside the port-side wing root. A common master switch is located on the front instrument panel. A 720 channel radio is fitted. The required frequency is selected by operating either the MHz or KHz knobs. An automatic squelch is provided by selecting "SQ" on the ON/OFF switch. The push-to-talk switches are located on top of the front and rear control columns. A LX160 electronic variometer is installed in the sailplane. Separate Notes are provided on the features and operation of this instrument. Taupo Gliding Club Inc Page 9 22/06/2010

10 Weight and Balance The minimum front seat loading for solo flight is 70 Kg. the maximum seat loading is limited to a maximum of 110 kg in each seat. Ballast weights may be added for under-weight pilots in the front seat. The lead weights are secured by bolts located immediately in front of the front pilot seat. The yellow coloured weights are stored in the hanger. A Ballast Trim chart is located in the front cockpit of the glider FLYING The ASK 21 is a docile and very stable aircraft, and offers no unusual or adverse tendencies. Pre-Takeoff Checks Before entering the cockpit, complete the standard pre-board checklist, A B C D Aircraft. No obvious damage, faults etc. DI d, Maint Release completed etc. Ballast. Fitted as required. Controls, working in the correct sense. Dolly, no tail dolly fitted. After entering the cockpit, the standard pre take-off (CBS IFT CBE) check is completed. C B S I F T C E Controls Ballast - Weight Security - Harness Instruments Flaps Trim Canopy closed and locked Eventualities TAKE-OFF Aerotow Connect the tow rope to the front release, located under the front pilot seat. In the initial ground run, it is necessary to lift the nose wheel off the ground to obtain steerage. This can be achieved a relatively slow speed. Hold the aircraft on the main wheel, maintaining directional control with rudder and wings level with aileron. As speed increases, the aircraft will fly off. Hold the sailplane parallel to the ground until the Tug becomes airborne. The Maximum Aerotow Speed is 97 Kts. Winch Tow Connect the winch wire, using the small ring, to the rear release mechanism, located in front of the main wheel, under the rear pilot. Taupo Gliding Club Inc Page 10 22/06/2010

11 In the initial ground run, it is necessary to lift the nose wheel off the ground to obtain steerage. This can be achieved a relatively slow speed. Hold the aircraft on the main wheel, maintaining directional control with rudder and wings level with aileron. As speed increases, the aircraft will fly off. Enter the initial climb and full climb as speed increases. Towards the top of the launch, gently release the backpressure on the elevator, ensuring the glider continues to climb. When the winch driver signals the top of the launch by cutting the power, lower the nose and pull the release, twice. In the event of a winch wire break or winch failure, lower the nose quickly to maintain a safe flying speed. Release the winch cable. Proceed as briefed. Remember, every launch has a potential for failure - be prepared. The Maximum Winch Tow speed is 81 Kts. Free Flight The trim is effective at most weights, although at max AUW, there is a tendency to run out of back trim. Flight controls are relatively light and effective. The aircraft will accelerate quickly when the nose is lowered. A speed of knots is ideal for normal flight. A noticeable reduction in glider performance occurs above 80 Kts. Stall No positive breakaway occurs with a gentle stall. A nose high stall results in a definite breakaway. Some buffeting of the elevator is felt. There is little tendency to drop a wing. Recovery is quick and effective with slight forward stick. At most weight configurations, the aircraft will not tend to spin unless the C of G position is towards the aft limit which may be achieved with a light weight pilot in the front seat. Approach and Landing. The approach and landing is straight forward. Approach is made at 52 knots plus half wind / gust strength. Having decided to land, complete the pre-landing Checklist, S Security front and rear U Undercarriage Fixed. F Flaps Not Fitted. T Trim for speed B Free and operating together Speed Safe Speed near the Ground 1.5 Vs + ½ wind/gust speed. The airbrakes are very effective. Aim to touch-down with approximately half airbrake to avoid high rates of descent. Side-slipping is effective in increasing the sink rate however care needs to be exercised as the pressure on the rudder reduces to zero at maximum deflection, requiring the rudder to be pushed back to neutral. Touchdown should be made in a two-point attitude, main wheel and tail wheel. Taupo Gliding Club Inc Page 11 22/06/2010

12 Directional control is maintained while the nose-wheel is off the ground. The very effective wheel brake is operated at the full extension of air brake. Ensure the wheel brake is not actuated if full airbrake is used at touchdown. Ground Handling The sailplane can comfortably be handled by 2 persons on the ground, one on the wing tip, the other on the nose, pushing the aircraft backwards. Push down on the nose to lift the tail when turning. Taupo Gliding Club Inc Page 12 22/06/2010

13 TAUPO GLIDING CLUB. PILOT HANDLING NOTES ASK 21 Aircraft Details Wing Span: 17 metres Length: 8.35 metres Weight & Balance Aircraft Empty Weight: 360 Kg Max All Up Weight: 600 Kg Max cockpit loading: Front Seat 110 Kg. Rear Seat 110 kg Min Front Seat Weight: Solo 70 Kg Lead Weights Min Front Seat Lead Weights Min Front Seat (Kg) (Kg) 0 70 Kg Kg Kg Kg Kg Kg Kg Kg Kg Kg Kg Tow Line Weak Link (Max) Winch tow 1000 Kg, Aerotow 600 Kg. Speeds VNE Max Winch Tow Max Aerotow Best L/D Stall 151 Kts IAS 81 Kts IAS 97 Kts 48.5 Kts 35 Kts at 470 Kg, 40 Kts at 600 Kg Max Control Deflection Va 97 Kts Rough Air Vb 108 Kts Safe Approach (1.5 X Vs) 52 Kts + 1/2 wind / gust speed (at 470 kg) Taupo Gliding Club Inc Page 13 22/06/2010

14 ASK 21 Wheel Brake The ASK 21 wheel brake system consists of a "Cleveland" (or similar) hydraulically operated disc brake, actuated at the full extent of travel of the airbrake lever. This brake system is extremely effective in stopping the glider on the ground. There are some important features pilots must be aware of in order to ensure the ongoing effectiveness of this braking system. a) While the brake system is very effective, be aware of the tremendous heat the brake is capable of generating. Gliders have been burnt as a result of fires started by the brake system. b) The heart of the brake system is the master cylinder, which is actuated by the Airbrake lever. It is possible to apply tremendous force to the brake pads through the Airbrake lever. c) The Brake Pads and Brake Disc are subject to wear. Pilots must inspect the Brake Pads at the Daily Inspection, to ensure the pads are not worn sufficient to damage the Brake Disc. Damage to the disc may occur if the rivets, which hold the Brake Pads to the Brake Pad Holder, protrude above the Brake Pads (due to wear) and come into contact with the Brake Disc. Braking efficiency will be significantly reduced if this occurs. Check: - the hydraulic (brake) fluid level in the small storage vessel which is located on the L/Hand side of the rear seat under the cockpit trim. Mil (Military) or aviation grade brake fluid only must be used. - the wear on the brake disc pads (see sketch) at each DI. - This reservoir is visible through a small "window". Never: - get into a situation where the wheel brake must be relied on to avoid damaging the glider. o Never land directly towards another glider, vehicle, hangar, fence, tree, crops, stationary object etc - land with the airbrake fully extended, causing the wheel brake to be fully applied. - tow the glider, either with a tow rope or the tow-out gear, with the airbrakes held open by the Harness. Taupo Gliding Club Inc Page 14 22/06/2010

15 Wheel / Braking System Main Wheel , 6 Ply rating. Nose Wheel , 4 Ply rating Tail wheel Inflate to 40 psi, 270 kpa, 2.7 Bar Inflate to 30 psi, 200 kpa, 2.0 Bar Inflate to 37 psi, 250 kpa, 2.5 Bar The tyre pressure in the main wheel recommended at 40 psi is critical in preventing damage to the tyre/tube. A tyre/tube with low pressure may turn "on the rim" in the event of landing with the wheel brake "ON". This will cause the valve stem to be ripped from the tube. If the tyre looks flat, the chances are it is. Brake Assembly Cleveland 30-9 Brake Assy. Brake Fluid Esso UNIVIS J-13 or AeroShell Fluid 4 or similar, ie Mil spec brake fluid.. Bleeding the brake system; Length of clear polythene hose, connected to bleed nipple below the Brake Cylinder on the main wheel. Discharge to Fluid reservoir or Separate container. Brake Pad Lining Minimum thickness Brake Disc Minimum thickness 2.54 mm 4.24 mm To Change Brake Pads (under G1109 supervision) a) Remove wheel fairing. b) Cut safety wire, remove 2 X thru bolts. c) Remove Brake Pads. d) Replace Pads, insert 2 X thru bolts and secure. e) Safety wire the thru bolts. f) Re-install wheel fairing. Brake Pad "Tell Tale" a small cutout on each end of brake pads is incorporated to identify when a Brake Pad has worn to its minimum thickness. When this "cutout" is no longer visible, the Pads should be changed. Note: Not all pads have this "tell-tale". Taupo Gliding Club Inc Page 15 22/06/2010

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17 1. Undercarriage Tyres. Taupo Gliding Club ASK 21 SPARE PARTS LISTING Main Wheel , 6 Ply rating Tubes Nose Wheel , 4 Ply rating Tube Tail wheel Inflate to 40 psi, 270 kpa, 2.7 Bar Inflate to 30 psi, 200 kpa, 2.0 Bar Inflate to 37 psi, 250 kpa, 2.5 Bar 2. Wheel / Wheel Brake. Rim Cleveland wheel, 4078 (B) , Type III. Disk Brake Cleveland Brake Assy, 30-9 Master Cylinder Master Cylinder Disc Brake Pads to suit 30-9 Cleveland Brake Assembly. Brake Fluid - Esso UNIVIS J-13 or AeroShell Fluid 4 or similar, ie Mil spec brake fluid.. High pressure brake hose. 3. Lock-wire 4. L'Hotellier Aileron 2 of M12.41 Airbrake 2 of M Taupo Gliding Club Inc Page 17 22/06/2010

18 Taupo Gliding Club ASK 21 MAINTENANCE SCHEDULE Registration: ZK-GTG Serial No: Manufactured: 2009 Landings: Airframe Hours: Wing Frequency: Ambient Temp:. o C, Comment:. 1. Lubrication; Grease - a quality multi-purpose grease. Oil A quality machine oil. 2. Control Stops Airbrake Brake Cylinder Aileron Pushrod Box, rear seat, ahead of stick. Elevator Tortion rod. Front and rear end. Rudder At the rudder, bearing bracket 3. Wheel Brake Disk Brake Pads, Min thickness 2.54 mm (o.10 in)... Disk Brake Min thickness mm (0.167 in)... 6 yearly intervals, replace high pressure brake hose, Due. 4. Control Deflections (mm) Left Right Comment Aileron Up 110 +/ (inboard end Down 45 +/- 5 Elevator Up 90 +/- 5 Down 65 +/- 5 Rudder 180 +/- 20 Airbrake Up Release Force 12 kg Airbrake Force kg 6. Grease Points Nipples Control Column Landing Gear Rocker 7. Releases: Aerotow Type: Winch Type:. Ops since last Taupo Gliding Club Inc Page 18 22/06/2010

19 Taupo Gliding Club ASK 21 MAINTENANCE SCHEDULE Registration: ZK-GTG Serial No: Manufactured: Instruments a) ASI Front Type:. S. No:.. Rear Type:.. S. No:.. Man. UP DOWN (Kts) Front ASI Rear ASI Error Front ASI Rear ASI Error +/ b) Altimeter: Date:.. /../... Time:..Hrs QNH: Elev: Ft Front Type:. S.No:. QNH:.. Alt Reading: Ft Rear Type:. S. No: QNH:.. Alt Reading:...Ft Allowable error: 100 Ft c) Airbrake Locking Each airbrake has a separate toggle in the wing. A check must be made that these lock simultaneously and securely. 1) Connect airbrakes individually. 2) Identify one linkage "dead centre", mark operating lever. 3) Repeat for other linkage, mark operating lever. 4) Marks to be within 5mm of each other and 5) the front lever should have 10 mm free forward movement. For adjustment of over-centre, see ASK 21 Maintenance Instruction A. Taupo Gliding Club Taupo Gliding Club Inc Page 19 22/06/2010

20 ASK 21 MAINTENANCE SCHEDULE Registration: ZK-GTG Serial No: Manufactured: 2009 Control Surface Sealing Tapes See ASK 21 Maintenance Instruction C for detail of replacement of sealing tapes. Weight & Balance a) Max weight, Non-lifting parts 410 kg. b) Max AUW 600 kg. Items Found OUTSIDE Tolerance:.. Items Requiring Replacement:. Planned Maintenance Items 1. Item. Due at:./ / or TTIS Hrs Action: 2. Item. Due at:./ / or TTIS Hrs Action: 3. Item. Due at:./ / or TTIS Hrs Action: 4. Item. Due at:./ / or TTIS Hrs Action: 5. Item. Due at:./ / or TTIS Hrs Action: Notes:.. Name:.. Signature:. #... Date: / /. Taupo Gliding Club Inc Page 20 22/06/2010